{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990819150",
    "entityType": "Track",
    "nonce": "0x565078e1ee04c0755f892e72b8f6fe9c733a252dfa3111fa61a8e55a0865d2e9",
    "signature": "0x1082c2a139c48aff4fe5d04e5fa1d9c5e1f70bca79662f807fa940e3439815b53409b316d794904a8e7c26568158c74f064af176d5875a448d35284a306150c11c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}